To change your address on file, please log in to your account. On your account page, click on the Address Book icon. When you click on that icon, you will be taken to a page where you can edit your current billing address, add a new address, or delete the address you have on file.
Everything in the Daz 3D store is for download only. Nothing will be shipped to you. The billing address in your account will need to match the billing address on your payment method in order for purchases to be processed.